I think many hobby developers also see “hobby” developing as part of their career, so they would happily try and have their hobby align with future employment possibilities. Since companies avoid GPL, those devs will rather choose a license that is more attractive to those potential employers when they see their portfolio.
Yes, but the loophole I was mentioning allows companies to not release the code even when it’s GPL, that’s why I was mentioning the AGPL (which is different from the LGPL).